Scanning susceptometer

Details Scanning susceptometer Scanning susceptometer

2009-04-14

2011-10-18

Nguyen, Hoai-An D (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

C324S239000, C600S444000

Reexamination Certificate

active

08040128

ABSTRACT:
According to one embodiment, an apparatus comprises a magnet assembly to produce a static magnetic field and a set of high-Tcflux transformers to detect a flux change from an item when the item is subjected to the static magnetic field produced by the magnet assembly and to produce a current based on the flux change. Additionally, the apparatus comprises a set of magnetoresistive sensors to detect a field produced by a current produced in the set of high-Tcflux transformers and a scanning mechanism to produce cyclic relative motion between the apparatus and the item. Furthermore, the apparatus comprises a magnetic shield to shield the magnetoresistive sensors, where the shield is an open ended cylinder made from mu-metal, where mu-metal is a very high magnetic permeability iron-nickel alloy. The apparatus additionally comprises a water interface mechanism to fill a gap between the apparatus and the item with water.

REFERENCES:
patent: 7047059 (2006-05-01), Avrin et al.
patent: 7650178 (2010-01-01), Scheffler
patent: 2003/0178995 (2003-09-01), Peshkovsky et al.
patent: 2009/0195249 (2009-08-01), DeMeester et al.
patent: 2010/0102813 (2010-04-01), Schulz et al.

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